DATAFILES is a mandatory clause for each external table. It specifies the file path where the data can be read from or written to.
DATAFILES是每个外部表的必需子句，它指定读写数据的文件路径。
DATAFILES is a mandatory clause for each external table. It specifies the file path where the data can be read from or written to.
DATAFILES是每个外部表的必需子句，它指定读写数据的文件路径。
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